NACE CP1
The deterioration of a substance, usually a metal
corrosion
from a reaction with its environment
A layer of oxides formed on the surface of a
Passivation
metal that provides corrosion protection.
the elements of a Anode, cathode, metallic pathway, electrolyte
corrosion cell
what happens at the The metal dissolves into the electrolyte
anode
the function of the Allows the flow of electrons to connect the
metallic pathway corrosion cell
A listing in order of reactivity ( more or less
galvanic series
noble) in seawater 25c
The less noble (more reactive) metal when
The general rules of
connected to a more noble (or less reactive
galvanic corrosion
metal) will corrode preferentially.
the five most important Humidity, oxygen, chemical salts, pollutants,
factors that affect the temperature
rate of corrosion.
Results in a relatively uniform loss of material
over the entire surface. Results in a general
General corrosion
thinning of the affected surface. Realively easy
to inspect. Does not cause catastrophic failures.
Typically pitting and crevice corrosion. It is
typically of the most concern as damage is
Localized corrosion
concentrated and loss of integrity or structure
failure can result.
The deterioration of a substance, usually a metal
corrosion
from a reaction with its environment
A layer of oxides formed on the surface of a
Passivation
metal that provides corrosion protection.
the elements of a Anode, cathode, metallic pathway, electrolyte
corrosion cell
what happens at the The metal dissolves into the electrolyte
anode
the function of the Allows the flow of electrons to connect the
metallic pathway corrosion cell
A listing in order of reactivity ( more or less
galvanic series
noble) in seawater 25c
The less noble (more reactive) metal when
The general rules of
connected to a more noble (or less reactive
galvanic corrosion
metal) will corrode preferentially.
the five most important Humidity, oxygen, chemical salts, pollutants,
factors that affect the temperature
rate of corrosion.
Results in a relatively uniform loss of material
over the entire surface. Results in a general
General corrosion
thinning of the affected surface. Realively easy
to inspect. Does not cause catastrophic failures.
Typically pitting and crevice corrosion. It is
typically of the most concern as damage is
Localized corrosion
concentrated and loss of integrity or structure
failure can result.
